Silmir, Spark Of Death

+2: Put the top three cards of your library into your graveyard, then create a 2/2 Zombie creature token.
-X: Return a creature card with converted mana cost X from your graveyard to the battlefield. It becomes a Zombie in addition to its other types.
-12: You may put all creatures in your library and graveyard onto the battlefield. If you do, shuffle your graveyard into your library.